24CS256T-I/CS0668

Memory IC Overview

The Microchip Technology 24CS256T-I/CS0668 is a 256-Kbit (32K x 8) serial EEPROM featuring an I2C interface with High-Speed mode support up to 3.4 MHz. It operates within a voltage range of 1.7V to 5.5V and supports industrial temperatures from -40°C to +85°C. The device includes a built-in 128-bit factory-programmed serial number, user-lockable ID pages, and Error Correction Code logic for data integrity.

Memory IC Feature Summary

• Integrated Security Register containing a unique 128-bit serial number and lockable user identification space
• Built-in Error Correction Code logic capable of correcting single-bit read errors within four-byte blocks
• Configurable write protection supporting both hardware pin control and enhanced software zone locking
• High-speed I2C communication capability reaching 3.4 MHz with Schmitt trigger inputs for noise suppression

Memory IC Applications

• Automotive systems requiring AEC-Q100 qualified nonvolatile memory
• Industrial equipment needing reliable data logging and configuration storage
• Consumer electronics utilizing product serialization and anti-counterfeiting measures
• Embedded controllers storing calibration data and system parameters

Memory IC Procurement Notes

Verify the specific suffix CS0668 corresponds to the 8-ball CSP package type during sourcing. Confirm the 'I' designation matches the required industrial temperature range of -40°C to +85°C. Ensure the component meets RoHS compliance standards if applicable to your manufacturing process. Cross-reference the datasheet revision to confirm feature consistency.

Memory IC Selection Notes

Select this component when high-speed data transfer rates are necessary alongside robust security features. The inclusion of ECC logic makes it suitable for environments where data corruption risks are elevated. Consider the compact CSP package for applications with strict board space limitations compared to standard SOIC or TSSOP options.

Memory IC Part Context

This part belongs to the 24CS series of serial EEPROMs, which distinguishes itself through integrated security registers and error correction capabilities not found in the legacy 24LC or 24AA families. It maintains backward compatibility with standard I2C protocols while offering advanced features like manufacturer identification codes and permanent software write protection.

Memory IC Replacement Considerations

Direct functional substitutes include other 24CS256 variants with different package suffixes such as SN or MSOP. For legacy replacements, verify that the 24LC256 or 24AA256 can accommodate the required speed and voltage specifications, noting they lack the integrated ECC and security register features.